Cluster and merge

Cluster and merge

Cluster & Merge is used to replace multiple versions of the data which are expressed differently with the same version. 

For example, if the following country names all appear in your data: U.S., U.S.A., USA.
They all refer to the same country. You can choose to replace all these variations with one term, USA

The operation can also be used to remove spelling errors in data and ensure the columns show uniformity in data. This is particularly helpful for cleaning and preparing data harvested from multiple data sources.

To perform Cluster & Merge:

1. Right-click the column and select the Cluster & Merge option from the context menu.

2. Choose one of the following language model algorithms to find clusters in your data:  
  1. Metaphone 
  2. Fingerprint
  3. n-gram
  1. The metaphone algorithm groups words by pronunciation and is the default algorithm used to find the clusters. 
  2. The fingerprint and n-gram algorithms are used to check spelling errors in your column data and resolve text mismatches.
  3. The 'N' value represents the continuous sequence of N words to be found in the clusters. 
    For example, n-gram size of 'Zoho' is 1-gram, 'Zoho Corporation' is 2-gram, etc.
2. The operations panel shows all of the clusters recognized as cards. 

3. Select the items to be replaced using the checkboxes.

4. Use the text box in each card to enter a new value. This value will replace the selected items in the columns.

You can de-select a cluster card using the checkbox at the top-right corner (bookmarked in blue). 

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